Not disagreeing about the Ham legal 1.2ghz possibility just stating that of the two systems that were actually freq tested, both were under 1.2ghz.
Both of the Spylinker 800mw systems I have and the one my father bought did have the regulator on a PC board inside the camera cable. We found this out when my dad fried his after removing the cable.
Systems sold by other Hong Kong dealers would most likely have different cameras with them plus I am sure what Spylinker sells changes as availability changes.
Anyway, the ones we have do broadcast below 1240mhz.
ORIGINAL: Kamikazi
Some earlier messages seemed to imply that transmitting video in the 1.2 gHz band was illegal. I was just trying to clarify that was not necessarily the case. There are HAM legal frequencies there. The Hong Kong systems may well all be transmitting outside the legal frequencies.